CN106207925A - A kind of distribution network line ice melting system and de-icing method thereof - Google Patents
A kind of distribution network line ice melting system and de-icing method thereof Download PDFInfo
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- CN106207925A CN106207925A CN201610589866.XA CN201610589866A CN106207925A CN 106207925 A CN106207925 A CN 106207925A CN 201610589866 A CN201610589866 A CN 201610589866A CN 106207925 A CN106207925 A CN 106207925A
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- ice
- melt
- line
- distribution network
- icing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention discloses a kind of distribution network line ice melting system and de-icing method thereof, system includes main line fixed exchange ice-melt unit, long branch line movable DC ice-melt unit and short branch line Portable DC ice-melt unit, described main line fixed exchange ice-melt unit includes that ice-melt switchs, ice-melt protection device, fixing ice-melt voltage output device, long branch line movable DC ice-melt unit includes interconnective mobile ice-melt TRT and the first ice-melt fairing, short branch line Portable DC ice-melt unit includes interconnective portable ice-melt TRT and the second ice-melt fairing；Method includes selecting different ice-melt unit to carry out exchanging ice-melt or DC ice melting according to icing situation and circuit types.The present invention is directed to main line, long branch line, short branch line are designed, and contain all line ice-meltings of power distribution network, it is possible to increase the efficiency of distribution network line ice-melt and expand ice-melt scope, strengthen distribution network line and resist freezing rain and snow disaster ability on a large scale.
Description
Technical field
The invention belongs to electrical engineering technical field, be specifically related to a kind of distribution network line ice melting system and ice-melt side thereof
Method.
Background technology
Since 2008, south freezing rain and snow disaster on a large scale is to province power systems such as Hunan, Guizhou, Jiangxi, Zhejiang
Causing heavy losses, distribution network line belongs to the terminal of sale of electricity, and widely distributed, is in mima type microrelief microclimate region, tower more
Line-outage contingency takes place frequently, and has directly influenced the reliable power supply of user.The distribution network line ice melting system of research design, is to ensure that ice
The key of calamity customer power supply in period reliability.
Research about power distribution network ice melting system is few at present, and the power distribution network deicing device of part R&D institution research and development is main
For short-term road and ultrashort line ice-melting, ice-melt distance, the most all at below 3km, can only carry out part for distribution branch line and melt
Ice, is not yet formed for some region of ice-melt system.And distribution network line various arch types is many, typically small bore can only be led
Line implements ice-melt, ice-melt difficulty.Occur on a large scale ice damage time, current deicing device configuration is still not enough to support this area and joins
All line ice-meltings of network system.Therefore, set up a set of distribution network line ice melting system, contain all main lines of power distribution network,
Long branch line, the ice-melt of short branch line, according to needing the difference of ice-melt section, choose suitable de-icing method, become distribution network line and carry
Rise and resist problem demanding prompt solution in freezing rain and snow disaster ability on a large scale.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, it is provided that a kind of system is for power distribution network
Circuit main line, long branch line, short branch line are designed, and contain the ice-melt of all circuits of power distribution network, it is possible to be effectively improved distribution netting twine
The efficiency of road ice-melt and expansion ice-melt scope, strengthen distribution network line and resist the distribution netting twine of freezing rain and snow disaster ability on a large scale
Road ice melting system and de-icing method thereof.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of distribution network line ice melting system, melts including main line fixed exchange ice-melt unit, long branch line movable DC
Ice unit and short branch line Portable DC ice-melt unit, described main line fixed exchange ice-melt unit is located in transformer station, described
Main line fixed exchange ice-melt unit includes ice-melt switch, ice-melt protection device, fixing ice-melt voltage output device, described fixing
The input of ice-melt voltage output device passes sequentially through ice-melt protection device, ice-melt switch is connected with the 10kV bus of transformer station,
The control end of described ice-melt switch is connected with ice-melt protection device, and described long branch line movable DC ice-melt unit includes interconnecting mutually
The mobile ice-melt TRT connect and the first ice-melt fairing, described short branch line Portable DC ice-melt unit includes interconnecting mutually
The portable ice-melt TRT connect and the second ice-melt fairing.
Preferably, described long branch line movable DC ice-melt unit also includes vehicle-mounted chassis, described mobile ice-melt generating dress
Put and be installed in respectively on vehicle-mounted chassis with the first ice-melt fairing.
Preferably, the outfan of described fixing ice-melt voltage output device is provided with ice-melt disconnecting link.
Preferably, described vehicle-mounted chassis is provided with the first termination, described first termination and the first ice-melt rectification
The outfan of device is connected；Described short branch line Portable DC ice-melt unit also includes the second termination, described second wiring
The outfan of device and the second ice-melt fairing is connected.
Preferably, described fixing ice-melt voltage output device is many gears voltage output device.
Preferably, described mobile ice-melt TRT is diesel-driven generator, and described first ice-melt fairing is six kinds of pulses ripple
Fairing.
Preferably, described portable ice-melt TRT is intermediate frequency generator, and described second ice-melt fairing is six kinds of pulses ripple
Fairing.
The present invention also provides for the de-icing method of a kind of aforementioned distribution network line ice melting system, and step includes:
1) detect distribution network line power distribution network main line icing situation, if power distribution network main line reach the first designated ratio with
Upper scope generation icing, then redirect execution step 2)；Otherwise redirect execution step 3 when power distribution network main line local icing)；
2) if power distribution network main line icing reaches default icing warning value, then by little section in the power distribution network main line of icing
The outfan of fixing ice-melt voltage output device, as target line, is connected and by target line by face wire with target line
End short circuit ground connection, opens ice-melt switch and carries out target line exchanging ice-melt；Redirect execution step 4)；
3) if power distribution network main line local icing reaches default icing warning value, then by the power distribution network main line of local icing
In large-section lead section as target line, by outfan and one end phase of target line of the first ice-melt fairing
Connect and by the end short circuit ground connection of target line, open mobile ice-melt TRT and target line is carried out DC ice melting；Redirect
Perform step 4)；
4) the power distribution network long branch line icing situation of distribution network line is detected, if the long branch line of power distribution network reaches the second appointment ratio
Example range above generation icing, then redirect execution step 5)；Otherwise redirect execution step when power distribution network long branch line local icing
6)；
5) if power distribution network long branch line icing reaches default icing warning value, then the small bore in power distribution network main line is led
As target line after the power distribution network long branch line series connection of line and icing, by the outfan of fixing ice-melt voltage output device and
Target line is connected and by the end short circuit ground connection of target line, opens ice-melt switch and carries out target line exchanging ice-melt；Jump
Turn and perform step 7)；
6) if power distribution network long branch line local icing reaches default icing warning value, then the power distribution network by local icing is long
The outfan of the first ice-melt fairing as target line, is then connected and by score by branch line with one end of target line
The end short circuit ground connection on road, opens mobile ice-melt TRT and target line is carried out DC ice melting；Redirect execution step 7)；
7) for the target line generation icing between distribution network line part span or long branch line movable DC ice-melt
Unit and short branch line Portable DC ice-melt unit cannot carry out the target line of ice-melt, if target line icing reaches default
Icing warning value, then the outfan of the second ice-melt fairing is connected and by the end of target line with one end of target line
End short circuit ground connection, opens portable ice-melt TRT and target line is carried out DC ice melting.
Preferably, described one end with target line is connected and specifically refers to every by wire connecting clip and target line respectively
One phase conductor one end is connected.
Preferably, the described end short circuit ground connection of target line being referred to passes through shorting stub respectively by target line end
Again by grounding nail ground connection after each phase conductor is commonly connected.
Distribution network line ice melting system of the present invention has an advantage that
1, distribution network line ice melting system of the present invention includes main line fixed exchange ice-melt unit, long branch line movable DC
Ice-melt unit and short branch line Portable DC ice-melt unit, by main line fixed exchange ice-melt unit, long branch line movable type directly
Stream ice-melt unit and short branch line Portable DC ice-melt unit can contain different distribution network line length simultaneously, can realize a certain
The ice-melt of all power distribution networks in region, drastically increases distribution network line and resists the ability of freezing rain and snow disaster on a large scale.
2, distribution network line ice melting system of the present invention includes main line fixed exchange ice-melt unit, long branch line movable DC
Ice-melt unit and short branch line Portable DC ice-melt unit, take from transformer station's power taking source, vehicle power and portable power supplies
Three kinds of ways to take power, ice-melt capacity and ice-melt convenience when taking into account distribution line ice-melt, exploitativeness is strong.
3, distribution network line ice melting system of the present invention includes main line fixed exchange ice-melt unit, long branch line movable DC
Ice-melt unit and short branch line Portable DC ice-melt unit, for different line lengths, can choose alternating current-direct current ice-melt flexibly
Mode, reduces the workload of system operation maintenance, ice-melt mobility strong, and ice-melt efficiency is high.
4, distribution network line ice melting system of the present invention includes main line fixed exchange ice-melt unit, long branch line movable DC
Ice-melt unit and short branch line Portable DC ice-melt unit, by selecting different melting for different circuit types and length
Ice mode, solves various arch types in power distribution network many well, a difficult problem for ice-melt difficulty.
5, the present invention is directed to part circuit when carrying out ice-melt, main line can be realized and do not have a power failure, improve distribution network line ice-melt
Time power supply reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present embodiment distribution network line ice melting system.
Marginal data: 1, main line fixed exchange ice-melt unit；11, ice-melt switch；12, ice-melt protection device；13, fixing
Ice-melt voltage output device；14, ice-melt disconnecting link；2, long branch line movable DC ice-melt unit；21, ice-melt TRT is moved；
22, the first ice-melt fairing；23, vehicle-mounted chassis；24, the first termination；3, short branch line Portable DC ice-melt unit；
31, portable ice-melt TRT；32, the second ice-melt fairing；33, the second termination.
Detailed description of the invention
As it is shown in figure 1, the present embodiment distribution network line ice melting system includes main line fixed exchange ice-melt unit 1, draws money on credit
Line movable DC ice-melt unit 2 and short branch line Portable DC ice-melt unit 3, main line fixed exchange ice-melt unit 1 is located at
In transformer station, main line fixed exchange ice-melt unit 1 includes that ice-melt switch 11, ice-melt protection device 12, fixing ice-melt voltage are defeated
Going out device 13, the input of fixing ice-melt voltage output device 13 passes sequentially through ice-melt protection device 12, ice-melt switch 11 and becomes
The 10kV bus in power station is connected, and the control end of ice-melt switch 11 is connected with ice-melt protection device 12, and long branch line movable DC melts
Ice unit 2 includes interconnective mobile ice-melt TRT 21 and the first ice-melt fairing 22, short branch line Portable DC
Ice-melt unit 3 includes interconnective portable ice-melt TRT 31 and the second ice-melt fairing 32.
In the present embodiment, the 10kV bus of transformer station can be taken from corresponding area distribution 35kV or 110kV as required and become
Power station, the ice-melt switch 11 commercially available KYN28 type 10kV switch cubicle of employing；Ice-melt protection device 12 uses commercially available XDBH-10 type to protect
Device, possessed fast tripping protection, stream protection, differential protection function, was provided simultaneously with excitation surge current identification braking function, and ice-melt occurs
During fault, tripping ice-melt switch 11 is cut off the electricity supply；In the present embodiment, fixing ice-melt voltage output device 13 is that many gears voltage is defeated
Going out device, concrete employing XDRB-7000 type deicing device, capacity is 7000kVA, and input voltage is 10kV, can hinder according to circuit
The different gear ice-melt voltage of anti-selection, with satisfied different circuit types and the ice-melt needs of length.In the present embodiment, fixing ice-melt
The outfan of voltage output device 13 is provided with ice-melt disconnecting link 14, can control fixing ice-melt voltage easily by ice-melt disconnecting link 14
The voltage output of output device 13, safe and reliable.Ice-melt disconnecting link 14 specifically uses XDDZ-10.5 type disconnecting link, and rated voltage is
10.5kV, three-phase ganged is to improve the reliability of operation.
Main line fixed exchange ice-melt unit 1 is designed mainly for power distribution network main line ice-melt, and parts are built distribution in and become
Inside power station, in working order under, from distribution network transformer substation 10kV bus power taking source, be connected to ice-melt switch 11, ice-melt switch 11
Connecting ice-melt protection device 12, ice-melt protection device 12 connects fixing ice-melt voltage output device 13, fixing ice-melt voltage output
Device 13 connects ice-melt disconnecting link 14, and ice-melt disconnecting link 14 is linked into by described wire connecting clip and treats ice-melt wire, leads at wire end
Cross shorting stub and carry out three-phase short circuit ground connection, it is achieved exchange ice-melt.Distribution main line circuit is long, and ice-melt power is big, carries electricity generation system
Deicing device cannot meet its ice-melt capacity, and distribution wire diameter is little, and reactive component is suitable with resistive component, high-power melts
During ice, DC ice melting relatively exchanges ice-melt advantage inconspicuous, and therefore the main line of the present embodiment fixed exchange ice-melt unit 1 is taked
From the mode in transformer station's 10kV bus power taking source on the spot, being input to fixing ice-melt voltage output device 13, fixing ice-melt voltage is defeated
Go out device 13 low voltage voltage adjustable, the suitable gear of line options can be gone out according to difference, export three-phase alternating voltage, fixing ice-melt electricity
Pressure output device 13 is accessed by wire connecting clip and treats ice-melt main line, carries out three-phase short circuit ground connection at main line end by shorting stub,
Ice-melt of closing switch 11, can be realized exchanging ice-melt, be protected all devices by ice-melt protection device 12 during ice-melt, therefore
Tripping ice-melt switch 11 during barrier.Main line fixed exchange ice-melt unit 1 can carry out ice-melt for the main line wire of 5km-30km.
In the present embodiment, mobile ice-melt TRT 21 is diesel-driven generator, and the first ice-melt fairing 22 is six kinds of pulses ripple
Fairing.Mobile ice-melt TRT 21 specifically uses commercially available comings diesel-driven generator, and generated output is 320kW, the highest
Output voltage is 400V, each sustainable generating 15 hours；First ice-melt fairing 22 uses XDZL-600 type six kinds of pulses ripple whole
Stream device, rectified power 600kW.In the present embodiment, long branch line movable DC ice-melt unit 2 also includes vehicle-mounted chassis 23, car
Carrying chassis 23 uses commercially available Isuzu Motors motor van, mobile ice-melt TRT 21 and the first ice-melt fairing 22 to fill respectively
It is located on vehicle-mounted chassis 23.In the present embodiment, vehicle-mounted chassis 23 is provided with the first termination 24, the first termination 24 and
The outfan of one ice-melt fairing 22 is connected, and the first termination 24 specifically uses YDJX-500 type termination, by first
The direct current output both positive and negative polarity of ice-melt fairing 22 docks with three-phase line, and rated current is 500A.
Set when long branch line movable DC ice-melt unit 2 is mainly for the long branch line of power distribution network or the ice-melt of main line local
Meter, parts can be realized by vehicle-mounted chassis 23 mobile, by mobile ice-melt TRT 21 as power supply, be linked into the first ice-melt whole
Stream device 22, moves the first ice-melt fairing 22 and is connected to the first termination 24, and it is positive and negative that the first termination 24 realizes direct current
Docking between pole with AC three-phase, the first termination 24 is linked into by described wire connecting clip and treats ice-melt conducting line segment head end,
Treating that ice-melt conducting line segment end carries out three-phase short circuit ground connection by described shorting stub, it is achieved long branch line or main line local DC melt
Ice.Distribution line line style is complicated, and branch line and part main line often exist the situation of multiple line style mixed set-up, directly takes main
Wire mounting exchange ice-melt unit 1 can only carry out ice-melt to the wire that line footpath is little, and the wire that line footpath is big carries out existence during ice-melt
Blow the risk of little line footpath wire.Long branch line movable DC ice-melt unit 2 use mobile ice-melt TRT 21 as power supply,
After the first ice-melt fairing 22 rectification, treat ice-melt conducting line segment by being linked into after wire connecting clip, treat ice-melt conducting line segment
End carries out three-phase short circuit ground connection by shorting stub, starts mobile ice-melt TRT 21 and can realize long branch line or part main line
DC ice melting.Long branch line movable DC ice-melt unit 2 is monolithically integrated on vehicle-mounted chassis 23, can realize mobile flexibly, adopt
Mobile ice-melt TRT 21 capacity can be reduced with DC ice melting, reduce the volume on vehicle-mounted chassis 23, optionally to not
DC ice melting is carried out with icing section.Long branch line movable DC ice-melt unit 2 can enter for the branch line of 0-5km and local main line
Row ice-melt.
In the present embodiment, portable ice-melt TRT 31 is intermediate frequency generator, and the second ice-melt fairing 32 is six kinds of pulses ripple
Fairing.Portable ice-melt TRT 31 specifically uses commercially available TF-12 type intermediate frequency generator, and generated output is 12kW, maximum
Output voltage is 24V, and weight is 70kg；Second ice-melt fairing 32 specifically uses XDZL-15 type six kinds of pulses ripple fairing, whole
Stream power 15kW.In the present embodiment, short branch line Portable DC ice-melt unit 3 also includes the second termination 33, the second wiring
Device 33 is connected with the outfan of the second ice-melt fairing 32.Second termination 33 specifically uses YDJX-400 type wiring to fill
Putting, the direct current of the second ice-melt fairing 32 is exported both positive and negative polarity and docks with three-phase line, rated current is 400A.Short branch line is just
Take the line ice-melting that formula DC ice melting unit 3 cannot arrive at mainly for the short branch line of power distribution network or vehicle to be designed, short branch line
Portable DC ice-melt unit 3 can realize mobile ice-melt based on portable ice-melt TRT 31 as carrying subject, portable melt
Ice TRT 31, as power supply, is linked into the second ice-melt fairing 32, and the second ice-melt fairing 32 is linked into second and connects
Line apparatus 33, the second termination 33 is linked into by described wire connecting clip and treats ice-melt conducting line segment head end, treating ice-melt conducting line segment
End carries out three-phase short circuit ground connection by described shorting stub, it is achieved the DC ice melting of the circuit that short branch line or vehicle cannot arrive at.
Many power distribution networks are in the obvious remote mountain areas of mima type microrelief microclimate, and icing situation is serious but traffic is the most inconvenient, and vehicle enters
Difficulty.Short branch line Portable DC ice-melt unit 3 takes the pattern of small power generation platform, take can 4 people carrying portable ice-melt
TRT 31, as ice-melt power supply, after the second ice-melt fairing 32 rectification, is waited to melt by being linked into after wire connecting clip
Ice conducting line segment, is treating that ice-melt conducting line segment end carries out three-phase short circuit ground connection by shorting stub, is starting portable ice-melt TRT 31
Can realize short branch line or vehicle cannot arrive at the DC ice melting of circuit.Short branch line Portable DC ice-melt unit 3 can be for 0-
The wire of 400m carries out ice-melt.
In sum, the present embodiment distribution network line ice melting system includes main line fixed exchange ice-melt unit 1, long branch line
Movable DC ice-melt unit 2 and short branch line Portable DC ice-melt unit 3, possess multiple way to take power, can select flexibly to hand over
DC ice melting mode, ice-melt mobility strong, solve various arch types in power distribution network well many, a difficult problem for ice-melt difficulty, cover
The ice-melt of all power distribution networks in a certain region, is greatly enhanced distribution network line and resists the ability of freezing rain and snow disaster on a large scale.
The step of the de-icing method of the present embodiment distribution network line ice melting system includes:
1) the power distribution network main line icing situation of distribution network line is detected, if power distribution network main line reaches the first designated ratio
(in the present embodiment, concrete value is 30%, can be adjusted as required) range above generation icing, then redirect execution step
2)；Otherwise redirect execution step 3 when power distribution network main line local icing)；
2) if power distribution network main line icing reaches default icing warning value, then by little section in the power distribution network main line of icing
The outfan of fixing ice-melt voltage output device 13, as target line, is connected and by target line by face wire with target line
End short circuit ground connection, open ice-melt switch 11 and carry out target line exchanging ice-melt；Redirect execution step 4)；
3) if power distribution network main line local icing reaches default icing warning value, then by the power distribution network main line of local icing
In large-section lead section as target line, by outfan and one end phase of target line of the first ice-melt fairing 22
Connect and by the end short circuit ground connection of target line, open mobile ice-melt TRT 21 and target line is carried out DC ice melting；Jump
Turn and perform step 4)；
4) the power distribution network long branch line icing situation of distribution network line is detected, if the long branch line of power distribution network reaches the second appointment ratio
Example range above generation icing, then redirect execution step 5)；Otherwise redirect execution step when power distribution network long branch line local icing
6)；
5) if power distribution network long branch line icing reaches default icing warning value, then the small bore in power distribution network main line is led
As target line after the power distribution network long branch line series connection of line and icing, by the outfan of fixing ice-melt voltage output device 13
Being connected with target line and by the end short circuit ground connection of target line, unlatching ice-melt switch 11 carries out exchange to target line and melts
Ice；Redirect execution step 7)；
6) if power distribution network long branch line local icing reaches default icing warning value, then the power distribution network by local icing is long
The outfan of the first ice-melt fairing 22 as target line, is then connected and by target by branch line with one end of target line
The end short circuit ground connection of circuit, opens mobile ice-melt TRT 21 and target line is carried out DC ice melting；Redirect execution step
7)；
7) for the target line generation icing between distribution network line part span or long branch line movable DC ice-melt
Unit 2 and short branch line Portable DC ice-melt unit 3 cannot carry out the target line of ice-melt, if target line icing reaches pre-
If icing warning value, then the outfan of the second ice-melt fairing 32 is connected and by target line with one end of target line
End short circuit ground connection, open portable ice-melt TRT 31 and target line carried out DC ice melting.
In the present embodiment, it is connected with one end of target line and specifically refers to every by wire connecting clip and target line respectively
One phase conductor one end is connected.In the present embodiment, wire connecting clip use XDJJ-2 type fast-wiring wire clamp, wire clamp can directly mount with
Treat DC ice-melting head end.In the present embodiment, refer to the end short circuit ground connection of target line pass through shorting stub respectively by score
Again by grounding nail ground connection after each phase conductor of road end is commonly connected.In the present embodiment, shorting stub uses XDDJ-3 type short
Connection device, device possesses grounding nail.
Such as in distribution network line, certain power distribution network main line is LGJ-95 Yu LGJ-70 various arch types, a length of 15km, wherein
The long 9km of LGJ-95 wire, the long 6km of LGJ-70 wire, have 5km section serious icing occur, be i.e. up to cover in LGJ-70 wire
Ice warning value.According to the de-icing method of the present embodiment distribution network line ice melting system, use main line solid for this transformer station's main line
Fixed pattern exchange ice-melt unit 1 carries out exchanging ice-melt, main line impedance: 4.99+j6.00 Ω, LGJ-70 wire ice melting current scope is
290A～420A, according to formula (1) with exchange (2) Suo Shi ice-melt computing formula can calculate ice-melt voltage range be 3918V～
5674V。
In formula (1) and (2), UminFor the minima of ice-melt voltage range, UmaxFor the maximum of ice-melt voltage range, Imin
For wire ice melting current stated range minimum, ImaxFor wire ice melting current scope maximum, R is line resistance value, and X is line electricity
Inductance value.Choose fixing ice-melt voltage output device 13 ice-melt voltage within the scope of this, set the protection of ice-melt protection device 12
Definite value, close ice-melt disconnecting link 14, connects fixing ice-melt voltage output device 13 by wire connecting clip and treats ice-melt wire head end,
Wire end carries out three-phase short circuit, ice-melt of closing switch 11 (choppers), can start wire is carried out ice-melt.After ice-melt terminates
Disconnect ice-melt switch 11, remove wiring.
Such as in distribution network line, there is the serious icing of 3km in one, somewhere LGJ-50 branch line, is i.e. up to icing warning
Value, local transit is suitable for long branch line movable DC ice-melt unit 2 and enters, according to the present embodiment distribution network line ice melting system
De-icing method, can be taken through long branch line movable DC ice-melt unit 2 and carry out long branch line and move DC ice melting.Icing section lead
Impedance: 1.68+j1.55 Ω, LGJ-50 wire ice-melt scope is 230A～350A, according to DC ice melting computing formula
Umin=1.5IminR (3)
Umax=2ImaxR (4)
In formula (3) and (4), UminFor the minima of ice-melt voltage range, UmaxFor the maximum of ice-melt voltage range, Imin
For wire ice melting current stated range minimum, ImaxFor wire ice melting current scope maximum, R is line resistance value, and wherein three connect
When line takes two to be in series, coefficient takes 2, three phase connections take two and a string time coefficient take 1.5.Calculate DC ice melting voltage range
For 580V～1176V.Long branch line is moved ice-melt parts and is positioned in the middle of ice coating wire section, the most at one end carry out short circuit, directly
Stream ice-melt voltage range is only 1/2 (Umin～Umax), i.e. 290V～588V.
The rated output voltage U of long branch line movable DC ice-melt unit 2dc=1.25Uac=500V.Use wire connecting clip
It is connected to the output voltage of long branch line movable DC ice-melt unit 2 treat in the middle of ice-melt wire (target line), by shorting stub
Treating ice-melt wire end ground connection, starting mobile ice-melt TRT 21, regulation ice melting current to suitable size can start to melt
Ice, after three-phase ice-melt terminates, closes mobile ice-melt TRT 21, removes shorted on one end line, carry out three-phase at the other end short
Connect, other half circuit is carried out DC ice melting.After all line ice-meltings complete, remove wiring.
Such as in distribution network line, there is the serious icing of 0.5km in one, somewhere LGJ-70 branch line, and icing section is positioned at partially
Distant mountain district, vehicle cannot be introduced into, and has LGJ-70, LGJ-50 various arch types on the main line at branch line place, and ice covering thickness will reach
To icing warning value, according to the de-icing method of the present embodiment distribution network line ice melting system, short branch line Portable DC is taked to melt
Ice unit 3 carries out short branch line Portable direct-current ice-melt.Icing section lead impedance: 0.20+j0.20 Ω, LGJ-70 wire ice-melt scope
For 290A～420A, calculating DC ice melting voltage range according to formula (3) and (4) is 87V～168V.Short branch line Portable DC melts
The rated output voltage U of ice unit 3dc=1.25Uac=30V.In view of short branch line Portable DC ice-melt unit 3 mobility strong
Feature, is divided into 5 parts by icing section, then every Partial DC ice-melt voltage range is 17.4V～33.6V, portable at short branch line
Within the ice melting capability of formula DC ice melting unit 3, wire connecting clip is used to be connected to treat ice-melt section by portable for short branch line ice-melt parts,
Carrying out three-phase short circuit at end, start portable ice-melt TRT 31, regulation ice melting current, to suitable size, can start to melt
Ice, after three-phase ice-melt terminates, closes portable ice-melt TRT 31, starts next section of ice-melt, until all 5 section ice-melts are complete
Portion terminates.
In sum, the de-icing method of the present embodiment distribution network line ice melting system according to the icing section of service interruption and
Icing situation, can choose ice-melting mode flexibly, reduces the workload of system operation maintenance, ice-melt mobility strong, ice-melt efficiency
High, it is possible to the ice-melt having carried out all distribution lines in a certain region, ice-melt scope includes all of main line and branch line,
And take from transformer station's power taking source, vehicle power and three kinds of ways to take power of portable power supplies, when taking into account distribution line ice-melt
Ice-melt capacity and ice-melt convenience, exploitativeness is strong.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (10)
1. a distribution network line ice melting system, it is characterised in that: include main line fixed exchange ice-melt unit (1), long branch line
Movable DC ice-melt unit (2) and short branch line Portable DC ice-melt unit (3), described main line fixed exchange ice-melt unit
(1) being located in transformer station, described main line fixed exchange ice-melt unit (1) includes that ice-melt switchs (11), ice-melt protection device
(12), fixing ice-melt voltage output device (13), the input of described fixing ice-melt voltage output device (13) passes sequentially through and melts
Ice protection device (12), ice-melt switch (11) be connected with the 10kV bus of transformer station, described ice-melt switch (11) control end with
Ice-melt protection device (12) is connected, and described long branch line movable DC ice-melt unit (2) includes that interconnective mobile ice-melt is sent out
Electric installation (21) and the first ice-melt fairing (22), described short branch line Portable DC ice-melt unit (3) includes being connected with each other
Portable ice-melt TRT (31) and the second ice-melt fairing (32).
Distribution network line ice melting system the most according to claim 1, it is characterised in that: described long branch line movable DC melts
Ice unit (2) also includes vehicle-mounted chassis (23), described mobile ice-melt TRT (21) and the first ice-melt fairing (22) point
It is not installed on vehicle-mounted chassis (23).
Distribution network line ice melting system the most according to claim 2, it is characterised in that: described fixing ice-melt voltage output dress
The outfan putting (13) is provided with ice-melt disconnecting link (14).
Distribution network line ice melting system the most according to claim 3, it is characterised in that: described vehicle-mounted chassis (23) is provided with
First termination (24), described first termination (24) is connected with the outfan of the first ice-melt fairing (22)；Described
Short branch line Portable DC ice-melt unit (3) also includes the second termination (33), described second termination (33) and second
The outfan of ice-melt fairing (32) is connected.
Distribution network line ice melting system the most according to claim 1, it is characterised in that: described fixing ice-melt voltage output dress
Putting (13) is many gears voltage output device.
Distribution network line ice melting system the most according to claim 1, it is characterised in that: described mobile ice-melt TRT
(21) being diesel-driven generator, described first ice-melt fairing (22) is six kinds of pulses ripple fairing.
Distribution network line ice melting system the most according to claim 1, it is characterised in that: described portable ice-melt TRT
(31) being intermediate frequency generator, described second ice-melt fairing (32) is six kinds of pulses ripple fairing.
8. the de-icing method of distribution network line ice melting system described in any one in a claim 1～7, it is characterised in that step
Suddenly include:
1) the power distribution network main line icing situation of distribution network line is detected, if power distribution network main line reaches the first above model of designated ratio
Enclose generation icing, then redirect execution step 2)；Otherwise redirect execution step 3 when power distribution network main line local icing)；
2) if power distribution network main line icing reaches default icing warning value, then the small bore in the power distribution network main line of icing is led
The outfan of fixing ice-melt voltage output device (13), as target line, is connected and by target line by line with target line
End short circuit ground connection, opens ice-melt switch (11) and carries out target line exchanging ice-melt；Redirect execution step 4)；
3) if power distribution network main line local icing reaches default icing warning value, then by the power distribution network main line of local icing
Large-section lead section is as target line, by outfan and one end phase of target line of the first ice-melt fairing (22)
Connect and by the end short circuit ground connection of target line, open mobile ice-melt TRT (21) and target line is carried out DC ice melting；
Redirect execution step 4)；
4) detect distribution network line power distribution network long branch line icing situation, if the long branch line of power distribution network reach the second designated ratio with
Upper scope generation icing, then redirect execution step 5)；Otherwise redirect execution step 6 when power distribution network long branch line local icing)；
5) if power distribution network long branch line icing reaches default icing warning value, then by the small section lead in power distribution network main line and
As target line after the power distribution network long branch line series connection of icing, by the outfan of fixing ice-melt voltage output device (13) and
Target line is connected and by the end short circuit ground connection of target line, and unlatching ice-melt switch (11) carries out exchange to target line and melts
Ice；Redirect execution step 7)；
6) if power distribution network long branch line local icing reaches default icing warning value, then by the long branch line of power distribution network of local icing
As target line, then the outfan of the first ice-melt fairing (22) is connected and by score with one end of target line
The end short circuit ground connection on road, opens mobile ice-melt TRT (21) and target line is carried out DC ice melting；Redirect execution step
7)；
7) for the target line generation icing between distribution network line part span or long branch line movable DC ice-melt unit
And short branch line Portable DC ice-melt unit (3) cannot carry out the target line of ice-melt, if target line icing reaches pre-(2)
If icing warning value, then the outfan of the second ice-melt fairing (32) is connected and by score with one end of target line
The end short circuit ground connection on road, opens portable ice-melt TRT (31) and target line is carried out DC ice melting.
The de-icing method of distribution network line ice melting system the most according to claim 8, it is characterised in that described and score
The one end on road is connected and specifically refers to be connected with each phase conductor one end of target line by wire connecting clip respectively.
The de-icing method of distribution network line ice melting system the most according to claim 9, it is characterised in that described by target
The end short circuit ground connection of circuit refers to be led to after commonly connected for each phase conductor of target line end by shorting stub respectively again
Cross grounding nail ground connection.
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| CN201610589866.XA CN106207925B (en) | 2016-07-25 | 2016-07-25 | A kind of distribution network line ice melting system and its de-icing method |
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| CN201610589866.XA CN106207925B (en) | 2016-07-25 | 2016-07-25 | A kind of distribution network line ice melting system and its de-icing method |
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| CN107482530A (en) * | 2017-09-20 | 2017-12-15 | 湖南省湘电试研技术有限公司 | Based on the Portable rural distribution exchange de-icing method and device for handing over orthogonal Two Stages |
| CN107658778A (en) * | 2017-10-08 | 2018-02-02 | 国网江西省电力公司电力科学研究院 | A kind of quick de-icing method of distribution network line |
| CN108336688A (en) * | 2018-04-23 | 2018-07-27 | 贵州电网有限责任公司 | A kind of horizontal access device of mobile DC ice melting |
| CN110445080A (en) * | 2019-06-25 | 2019-11-12 | 贵州电网有限责任公司 | A kind of power distribution network vehicle-mounted mobile AC ice melting device and method |
| CN110779577A (en) * | 2019-11-12 | 2020-02-11 | 国网湖南省电力有限公司 | Method and system for acquiring ice melting technical parameters of hot water deicing system |
| CN111668791A (en) * | 2020-06-19 | 2020-09-15 | 南方电网数字电网研究院有限公司 | DC serial ice melting device and system |
| CN111799736A (en) * | 2020-06-19 | 2020-10-20 | 国网安徽省电力有限公司检修分公司 | Manual deicing device for high-voltage line |
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| CN111668791A (en) * | 2020-06-19 | 2020-09-15 | 南方电网数字电网研究院有限公司 | DC serial ice melting device and system |
| CN111799736A (en) * | 2020-06-19 | 2020-10-20 | 国网安徽省电力有限公司检修分公司 | Manual deicing device for high-voltage line |
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